an introduction to laboratory equipment by: ms. buroker scott high school
TRANSCRIPT
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AN INTRODUCTION
TO LABORATORY EQUIPMENT
By: Ms. Buroker
Scott High School
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A CHEMIST
In any line of work, a professional is expected to know and understand how to use his or her “tools of the trade;” things are no different in a chemistry lab. This presentation will introduce you to the lab equipment you may be using during the duration of this course.
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ARGUABLY … THE MOST IMPORTANT PIECE OF “EQUIPMENT” YOU’LL USE IN LAB…
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BEAKERBeakers are used for the containing
or mixing of reagents. Beakers are NOT accurate;
therefore, we don’t use beakers
to measure amounts!!
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BEAKER TONGS
Used in removing a beaker from
a heat source, such
as, a Bunsen Burner.
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LAB TONGSCan be used to
pick up and/or hold many items … such as an evaporating dish or an Erlenmeyer flask.
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BURET A buret is used to
deliver solution in precisely-measured, variable volumes. Burets are used primarily for titration, to deliver one reactant until the precise end point of the reaction is reached.
Buret Clamp
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ERLENMEYER FLASKThese flasks are typically used to mix chemicals
and/or solutions … also not used
for accuracy!
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VOLUMETRIC FLASK
They are used for preparing the
exact volume of a sample
solution and/or standard solution.
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ROUND BOTTOM FLASK
The round bottom flask is used as:
reaction flask distilling flask collection flask
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FLORENCE FLASK
Also known as the “boiling flask,” the Florence Flask is designed for uniform heating and ease of swirling. Commonly used to store solutions.
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GRADUATED CYLINDER
Tall cylinder with a range of calibrated markings used for measuring the volumes of liquids in mL.
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TEST TUBES
A tube of glass, closed at one end, used to
contain chemicals during heating or other
reactions.
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TEST TUBE RACK
A device used to safely
support test tubes.
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TEST TUBE CLAMP A device used
to safely hold test tubes without having to use your bare hands … e.g., when heating the test tube.
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TEST TUBE CLEANER
Used to clean test
tubes
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SPATULA … SOMETIMES REFERED TO AS A “SCOOPULA”
Used when obtaining dry chemicals from a stock container.
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CRUCIBLE & LID
Made of porcelain and used to
contain chemical compounds when heating them to
very high temperatures.
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CRUCIBLE TONGS
Designed to pick up and hold a crucible … especially
when hot!!!
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EVAPORATING DISH
The evaporating
dish is used for heating …
usually when you want to evaporate a liquid from a
chemical.
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WATCH GLASS Typically used
as a “beaker cover,” but can also be used to evaporate the liquid from a
chemical.
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WIRE GAUZE WIRE GAUZE can be
used to support a container (such as a beaker or flask) during heating. When the bunsen burner flame is beneath it, the wire gauze helps to spread the flame (and heat) out evenly over the container.
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RING STAND Ring stands, used along with the appropriate clamp, are used to support and hold glassware in place during an experimental procedures.
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CLAMPS
Both are used to hold glassware in place on a ring stand.
Ring ClampUtility Clamp
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CLAY TRIANGLE
A clay triangle is used as a
support such as when heating crucibles or
holding a funnel during filtering.
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BUNSEN BURNER The function of
a Bunsen Burner is to heat substances. The burner can be regulated by changing the air and gas mixture
Inlet Valve
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PIPET
Used in dispensing small amounts of liquids.
Dropper Pipet
Plastic Pipet
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LAST, BUT NOT LEAST …
Funnel Forceps